Barbara, I didn't see an exact amount of yardage either, but 1 fat quarter of each color should be plenty. If your LQS cuts 1/4 yards pieces that would be enough to do it Margo's way. Full width of material. With the fat quarter, if the width after washing is over 21 inches, you will be able to get six sets out of one strip. So, you will need 7 one inch strips. If the fabric after washing is less than 21 inches you can get five out of each strip, so you will need 9 strips. That leaves about half the fat quarter for something else. I hope this isn't too confusing. Sometimes I know what I want to say, but it does't always come out the way I want it too.
Maybe it's an age thing?
I used to have a plaque that said: "Listen to what I mean, not what I say." So true for me. Drives my DH crazy.